Document Outline

• GENERAL INFORMATION
  • SAFETY PRECAUTIONS & WARNINGS
  • INTRODUCTION
  • BMS II GENERAL description
  • BMS II FEATURES
    • Simplified Installation and Set-Up
    • User-Friendly Control System Interface
    • Retention of Menu Option Settings
    • Application Flexibility
    • Sequential or Parallel Operation
    • Accuracy
    • Bumpless Transfer
    • Fault Alarm Surveillance
    • BMS II Programming Via RS232 Port.
• INSTALLATION
  • INTRODUCTION
  • SITE SELECTION AND mounting
    • Mounting the BMS
  • GENERAL WIRING REQUIREMENTS
  • POWER WIRING
  • SENSOR INSTALLATION AND WIRING
    • Header Sensor
    • Return Sensor
    • Outdoor Air Sensor
  • RS485 (MODBUS) WIRING AT the BMS II
    • BMS II Bias Switches & Loop Termination Resistors
  • RS485 (MODBUS) WIRING, bias & termination AT aerco boilers
    • RS485 Wiring, Termination& Bias for Benchmark Series and KC1000 Boilers
      • Method 1
      • Method 2
    • RS485 Wiring for Modulex Series Boilers
  • sample rs485 (modbus) network diagrams
  • rs232 wiring at the bms ii
  • INTERLOCK WIRING
    • Interlock 1 (INT 1) Wiring
    • Interlock 2 (INT 2) Wiring
  • SET BACK WIRING
  • RELAY WIRING
    • System Start Relay
    • Fault Alarm Relay
    • Auxiliary Relay
  • 4 – 20 mA WIRING
• OPERATION
  • INTRODUCTION
  • FRONT PANEL OPERATING CONTROLS AND DISPLAYS
  • BMS II MENU STRUCTURE
    • Menu Processing Procedure
  • operating menu
    • HEADER TEMP and PERCENT OF LOAD
    • HEADER SETPOINT
    • OUTSIDE AIR TEMP
    • I/O STATUS
    • RETURN TEMP
  • setup menu
    • ENTER PASSWORD
    • Date and Time Menu Options
  • RS232 MENU
    • RS232 MODE
    • RS232 BAUD RATE
    • MODBUS ADDRESS
    • NETWORK TIMEOUT
    • MODBUS PASS THRU
  • rs485 menu
    • RS485 BAUD RATE
    • MIN SLAVE ADDR
    • MAX SLAVE ADDR
    • NUMBER NETWK BLRS
    • MODBUS CNTL TYPE
    • NETW BOILER Xx ADDRESS= Yyy (Where Xx = 01 – 32; Yyy = 001 – 127)
  • field adjust menu.
    • HEADER SET MODE
    • HDR HIGH LIMIT
    • HDR LOW LIMIT
    • INTERNAL SETPT
    • RESET RATIO
    • BLDG REF TEMP
    • REMOTE SIGNAL
    • OFFSET ENABLE
    • Offset Menu Options
    • Setting Up An Offset Schedule
    • Manual Offset
  • Configuration menu
    • BOILER OP MODE
      • Parallel Mode
      • Sequential
    • SYS INTLK CONFIG
    • BLR START LEVEL
    • BLR STOP LEVEL
    • MAX POWER INPUT
    • FAIL SAFE MODE
  • TUNING menu
    • PROPORTIONAL BND
    • INTEGRAL GAIN
    • DERIVATIVE GAIN
    • HDR TEMP DEADBND
  • RELAY menu
    • SYS START TEMP
    • SYS START OPTION
    • SYS START INTLK
    • AUX RELAY OPEN
    • AUX RELAY CLOSE
    • FAULT ALRM RELAY
    • FAULT ALARM BLRS
    • FAULT ALRM CLEAR
  • CALIBRATION menu
    • HDR SENS OFFSET
    • OUTD SENS OFFSET
    • 4 - 20 MA OFFSET
    • RETN SENS OFFSET
    • RAMP UP %/MIN
    • RAMP DOWN %/MIN
    • LOAD START PCT
    • LOAD STOP PCT
    • RESET DEFAULTS
  • bms ii quick-start guide
    • CONSTANT SETPT MODE (Default)
    • REMOTE SETPT MODE
    • OUTDOOR RESET MODE
• PROGRAMMING BMS II OPERATING MODEs
  • INTRODUCTION
  • OUTDOOR RESET MODE
    • Selecting Outdoor Reset Mode
    • Determining Reset Schedule
    • Entering Reset Ratio and Building Reference Temperature
    • Selecting Boiler Operating Mode
    • Entering Boiler Start and Boiler Stop Levels
    • Entering System Start Temperature
    • Entering Load Start Percent (Required Only for Modulex Installations)
  • REMOTE SETPOINT MODE
    • Selecting Remote Setpoint Mode
    • Entering Header High Limit and Low Limit Temperatures
    • Selecting Remote Signal Type
    • Selecting Boiler Operating Mode
    • Entering Boiler Start and Boiler Stop Levels
    • Entering Load Start Percent (Required Only for Modulex Installations)
  • CONSTANT SETPOINT MODE
    • Selecting Constant Setpoint Mode
    • Selecting Internal Setpoint Temperature
    • Selecting Boiler Operating Mode
    • Entering Boiler Start and Boiler Stop Levels
    • Entering Load Start Percent (Required Only for Modulex Installations)
  • “temp and load” option
  • “start enabled” option
  • SYSTEM INITIALIZATION and polling
  • TESTING THE SYSTEM
• TROUBLESHOOTING
  • fault messages & common problems
    • H-2. BMS II Controller Standard Holding Register Assignments